CN116833910A

CN116833910A - Sand blasting device and sand blasting method for metal piece

Info

Publication number: CN116833910A
Application number: CN202311020455.5A
Authority: CN
Inventors: 吴本来
Original assignee: Guangde Zhuyue Metal Surface Treatment Co ltd
Current assignee: Guangde Zhuyue Metal Surface Treatment Co ltd
Priority date: 2023-08-14
Filing date: 2023-08-14
Publication date: 2023-10-03

Abstract

The utility model is suitable for the technical field of metal piece sand blasting processing, and provides a metal piece sand blasting device and a sand blasting method, wherein the sand blasting device comprises a sand blasting mechanism, a clamping mechanism and a cleaning mechanism, the sand blasting mechanism comprises a fixed shell with a sand blasting chamber, the clamping mechanism is arranged in the sand blasting chamber, the clamping mechanism comprises two rotating seats arranged on the inner wall of the sand blasting chamber, the rotating seats are slidably provided with fixed rods, meanwhile, the fixed rods are rotationally connected with clamping frames through connecting seats, swinging motors driving the clamping frames to swing are arranged on the connecting seats, so as to drive the swinging frames to vibrate, and the metal piece is driven to vibrate; the clearance mechanism is including the axis of rotation that has the electro-magnet, and when the waste material passed through the axis of rotation, metal impurity in the electro-magnet absorption waste material was convenient for filter the waste material, was convenient for carry out secondary to the waste material and use.

Description

Sand blasting device and sand blasting method for metal piece

Technical Field

The utility model belongs to the technical field of metal piece sand blasting processing, and particularly relates to a metal piece sand blasting device and a metal piece sand blasting method.

Background

In the current technical field of metal piece sand blasting, the sand blasting utilizes the impact action of high-speed sand flow to clean and coarsen the surface of a substrate. Compressed air is used as power to form high-speed spray beam to spray the sprayed material onto the surface of workpiece to be treated, so that the appearance or shape of the outer surface of the workpiece surface is changed and burrs on the workpiece surface are cleaned.

The utility model patent with publication number of CN215357977U discloses a sand blasting device for metal piece processing, control mechanism includes the mounting panel of welding in the inner wall both sides of box top, weld in the miniature push rod motor of the adjacent both sides outer wall of mounting panel, weld in the terminal baffle of miniature push rod motor, the feed chute is opened there is the slot with baffle looks adaptation, and the adjacent both sides outer wall of baffle all is provided with sealed pad, fixed establishment is including the rotary tank who opens in the outer wall of box both sides, rotate the rolling disc of installing in the rotary tank inner wall, weld in the mount of the adjacent both sides outer wall of rolling disc, set up in the fixed slot at the mount top, install in the inside electric telescopic handle of fixed slot, weld in the terminal fixed plate of electric telescopic handle, fixed plate bottom outer wall and mount bottom inner wall all are provided with the slipmat, and the slipmat respectively with fixed plate, mount looks adaptation, servo motor drive rolling disc rotates and drives the metal piece and turn over, compare in traditional device, do not need the manual work to turn over, prevent that high-pressure sand material from accidentally injuring operating personnel, the security is higher.

However, the above patent suffers from the following disadvantages:

1. in the above patent, the turntable is driven to rotate by the motor to turn over the metal piece and carry out sand blasting on the metal piece, but dead angles exist on the outer surface of the metal piece due to clamping of the metal piece, so that the sand blasting processing precision of the metal piece is reduced.

2. After the processing of the patent and the common sand blasting device is completed, waste sand is required to be collected, and then the abrasive is recycled, but the abrasive is easy to be doped with metal impurities, so that the abrasive cannot be recycled immediately, and the processing efficiency of sand blasting of metal pieces is reduced.

Disclosure of Invention

The utility model provides a metal part sand blasting device and a sand blasting method, which aim to solve the problems that dead angles exist on the outer surface of a metal part when the metal part is clamped in the background, the sand blasting processing precision of the metal part is reduced, and metal impurities are easy to dope in a used abrasive and cannot be recycled immediately.

The utility model discloses a metal piece sand blasting device and a sand blasting method, wherein the sand blasting device comprises a sand blasting mechanism, a clamping mechanism and a cleaning mechanism, and the clamping mechanism and the cleaning mechanism are fixedly arranged on the sand blasting mechanism;

the sand blasting mechanism comprises a support frame, a fixed shell is fixedly arranged on the support frame, and a sand blasting chamber is arranged in the fixed shell;

the clamping mechanism comprises rotating seats, two rotating seats are rotatably arranged on the inner walls of two sides of the sand blasting chamber, a first bevel gear is arranged on one rotating seat, a first driving motor is fixedly arranged in the fixed casing, and a second bevel gear meshed with the first bevel gear is arranged at the output end of the first driving motor;

the two rotating seats are respectively and slidably connected with a fixed rod, the end parts of the two fixed rods are respectively and fixedly provided with a connecting seat, the connecting seats are rotatably connected with a clamping frame through a hinge shaft, a plurality of connecting springs are arranged on the connecting seats, one ends of the connecting springs are fixedly connected with the connecting seats, and the other ends of the connecting springs are fixedly connected with the outer walls of the clamping frames;

one of the connecting seats is fixedly provided with a swing motor, and the output end of the swing motor is connected with the clamping frame through a transmission connecting rod in a transmission way; in the scheme, the clamping frame is driven to move by the swing motor through the transmission connecting rod, and meanwhile, the plurality of connecting springs drive the clamping frame to reset, so that the metal piece is driven to vibrate.

Preferably, a rack is arranged on the outer wall of the fixed rod;

a second driving motor is fixedly arranged in the rotating seat, and a transmission gear meshed with the rack is arranged at the output end of the second driving motor; in this scheme, driving motor two drives the dead lever and removes, and then adjusts the length of dead lever, is applicable to the metalwork of different models and uses.

Preferably, a fixing groove is formed in the clamping frame, a plurality of fixing bolts are connected to the clamping frame in a threaded mode, bolt heads are arranged at the upper ends of the fixing bolts, and fixing blocks made of plastic are arranged at the lower ends of the fixing bolts;

a sliding column is slidably arranged on the bottom wall of the fixed groove, a supporting pad is fixedly arranged on the sliding column, a damping spring is sleeved on the sliding column, one end of the damping spring is abutted against the bottom wall of the supporting pad, and the other end of the damping spring is abutted against the inner wall of the fixed groove; in this scheme, through a plurality of fixing bolt centre gripping metalwork, the supporting pad is used for supporting the metalwork simultaneously, and a plurality of fixing bolts centre gripping simultaneously, the fastness is higher.

Preferably, a storage tank is fixedly arranged on the support frame, and a sand pump is arranged at the discharge end of the storage tank through a pipeline;

a material conveying chamber is arranged on the top wall of the sand blasting chamber, a spray head is arranged at the lower end of the material conveying chamber, and the output end of the sand pump is communicated with the sand blasting chamber through a pipeline;

an air compressor is arranged on the support frame and is communicated with the material conveying chamber through a pipeline; in this scheme, the storage tank is used for storing the abrasive material, carries the inner wall to the material conveying room through the sand pump, and utilizes the air compressor machine to carry compressed air to the inside of material conveying room, promotes the abrasive material to spout by shower nozzle department, carries out the abrasive blasting to the outer wall of metalwork.

Preferably, the cleaning mechanism comprises a ball screw driven by a motor, the ball screw is rotatably arranged in the sand blasting chamber, and a sliding screw nut is connected to the ball screw in a threaded manner;

the sliding nut is fixedly provided with a lifting frame, the lifting frame is rotatably provided with a dust removing roller, and the outer surface of the dust removing roller is provided with a hairbrush layer; the motor on the ball screw in this scheme can be step motor, utilizes step motor to drive ball screw and rotates, and then drives crane longitudinal movement, and the internally mounted of sandblast room has the guide rail that supplies the crane to remove simultaneously, is convenient for adjust the height of dust removal cylinder, utilizes the brush layer clearance metalwork.

Preferably, a plurality of blowing heads are installed on the top wall of the sand blasting chamber, and a plurality of air inlet valves are installed on the blowing heads through pipelines; in the scheme, the air inlet pipe is connected with an air source, so that compressed air is blown out by the blowing head to clean the outer surface of the metal piece.

Preferably, a separation box is arranged at the lower end of the fixed casing, and the separation box is communicated with the sand blasting chamber;

a rotating shaft is rotatably arranged in the separation box, a plurality of electromagnets are uniformly distributed on the outer wall of the rotating shaft, a driving motor III is fixedly arranged on the outer wall of the separation box, and the driving motor III is in transmission connection with the rotating shaft;

the collecting box is arranged on the supporting frame and is communicated with the separating box; in this scheme, driving motor three drives the axis of rotation and rotates, utilizes a plurality of electro-magnets in the axis of rotation to adsorb the metallic impurity in the waste material, improves the machining efficiency of metalwork.

The utility model also provides a metal piece sand blasting method, which comprises the following steps:

s1, clamping a metal piece through the clamping mechanism;

s2, performing primary sand blasting processing on the metal piece by the sand blasting mechanism;

s3, turning over the metal piece for 180 degrees through the clamping mechanism, and then carrying out secondary sand blasting on the metal piece;

s4, cleaning the outer surface of the metal piece by using the cleaning mechanism.

Compared with the prior art, the utility model has the beneficial effects that: the utility model relates to a metal piece sand blasting device and a sand blasting method,

1. the clamping mechanism is arranged in the sandblasting room and comprises two rotating seats arranged on the inner wall of the sandblasting room, the rotating seats are slidably provided with fixing rods, meanwhile, the fixing rods are rotationally connected with clamping frames through connecting seats, swing motors driving the clamping frames to swing are arranged on the connecting seats, the swing frames are driven to vibrate, metal pieces are driven to vibrate, when sand is blasted on the outer wall of the metal pieces, the metal pieces vibrate through the metal pieces, sand is made to collide with the metal pieces in a reciprocating mode, dead angles on the metal pieces are reduced, and sandblasting accuracy is higher;

2. the cleaning mechanism comprises a rotating shaft with an electromagnet, and when the waste passes through the rotating shaft, the electromagnet adsorbs metal impurities in the waste, so that the waste is convenient to filter and is convenient to secondarily use;

3. and meanwhile, the top wall of the sand blasting chamber is provided with a blowing head connected with an air source to blow the outer surface of the metal piece, the interior of the sand blasting chamber is provided with a dust removing roller driven by a ball screw, and the outer surface of the metal piece is cleaned by utilizing a brush layer on the dust removing roller, so that impurities on the outer surface of the metal piece are reduced.

Drawings

FIG. 1 is a schematic view of the whole structure of the present utility model

FIG. 2 is an enlarged view of the utility model and at A in FIG. 1

FIG. 3 is a schematic view of a clamping mechanism according to the present utility model

FIG. 4 is a schematic view of a clamping frame according to the present utility model

FIG. 5 is a flow chart of the operation of the present utility model

In the figure:

1. a sand blasting mechanism; 11. a support frame; 12. a fixed housing; 121. a blasting chamber; 13. a storage tank; 14. a sand pump; 15. a material conveying chamber; 151. a spray head; 16. an air compressor;

2. a clamping mechanism; 21. a rotating seat; 211. bevel gears I; 22. driving a first motor; 221. bevel gears II; 23. a fixed rod; 231. a rack; 24. a second driving motor; 241. a transmission gear; 25. a connecting seat; 251. a connecting spring; 26. a swing motor; 27. a clamping frame; 271. a fixing groove; 28. a fixing bolt; 281. a bolt head; 282. a fixed block; 29. a support pad; 291. a sliding column; 292. a damping spring;

3. a cleaning mechanism; 31. a ball screw; 311. a sliding nut; 312. a lifting frame; 32. a dust removal roller; 321. a brush layer; 33. a blowing head; 331. an intake valve; 34. a separation box; 35. a rotating shaft; 351. an electromagnet; 352. a third driving motor; 36. and (5) collecting a box.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown.

The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model.

All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1-4, the present utility model provides a technical solution: the utility model provides a metalwork sand blasting unit, including sand blasting mechanism 1, fixture 2 and clearance mechanism 3 are all fixed mounting on sand blasting mechanism 1, sand blasting mechanism 1 includes support frame 11, fixed mounting has fixed casing 12 on the support frame 11, the inside of fixed casing 12 is provided with sand blasting room 121, fixture 2 includes rotation seat 21, two rotation seats 21 rotate and install on the both sides inner wall of sand blasting room 121, install bevel gear one 211 on one of them rotation seat 21, and fixed casing 12's inside fixed mounting has driving motor one 22, the output of driving motor one 22 is installed with bevel gear two 221 that meshes with bevel gear one 211, all sliding connection has dead lever 23 on two rotation seats 21, be provided with rack 231 on the outer wall of dead lever 23, and the inside fixed mounting of rotation seat 21 has driving motor two 24, driving motor two 24's output install with rack 231 engaged with drive gear 241.

Wherein, driving motor one 22 drives bevel gear one 211 and rotates, and then utilizes gear drive to drive rotation seat 21 and rotates, drives the metalwork upset, and driving motor two 24 utilizes gear drive to drive rack 231 and removes simultaneously, adjusts the length of dead lever 23, is convenient for the metalwork of centre gripping different models.

The tip of two dead levers 23 is all fixed mounting has connecting seat 25, and connecting seat 25 is connected with joint frame 27 through the articulated shaft rotation, and installs a plurality of connecting springs 251 on the connecting seat 25, connecting spring 251 one end fixed connection connecting seat 25, the outer wall of other end fixed connection joint frame 27, and fixed mounting has swing motor 26 on one of them connecting seat 25, and swing motor 26's output passes through drive connecting rod transmission connection joint frame 27.

Wherein, swing motor 26 drives joint frame 27 swing through the drive connecting rod, and connecting spring 251 pulling joint frame 27 simultaneously to utilize self elasticity to reset, make joint frame 27 take place the vibration, and then when the abrasive material bumps into the metalwork, the abrasive material receives the vibration, bumps into the metalwork repeatedly, reduces the sandblast dead angle on the metalwork, improves metalwork machining efficiency.

The clamping frame 27 is provided with a fixing groove 271, the clamping frame 27 is connected with a plurality of fixing bolts 28 in a threaded manner, the upper ends of the fixing bolts 28 are provided with bolt heads 281, the lower ends of the fixing bolts 28 are provided with plastic fixing blocks 282, sliding columns 291 are slidably mounted on the bottom walls of the fixing grooves 271, supporting pads 29 are fixedly mounted on the sliding columns 291, damping springs 292 are sleeved on the sliding columns 291, one ends of the damping springs 292 abut against the bottom walls of the supporting pads 29, and the other ends abut against the inner walls of the fixing grooves 271.

In addition, be provided with anti-skidding line on the bolt head 281, drive fixing bolt 28 through rotating bolt head 281 and rotate, utilize the fixed block 282 on the fixing bolt 28 to extrude the outer wall of metalwork, cooperation supporting pad 29 locking metalwork, the fixed block 282 of plastic system can prevent to damage the metalwork simultaneously, and when supporting pad 29 receives the extrusion, extrusion damping spring 292 promotes supporting pad 29 through damping spring 292 self elasticity, improves the stability of metalwork, is difficult for taking place not hard up.

The storage tank 13 is fixedly installed on the support frame 11, the sand pump 14 is installed at the discharge end of the storage tank 13 through a pipeline, the material conveying chamber 15 is arranged on the top wall of the sand blasting chamber 121, the spray nozzle 151 is installed at the lower end of the material conveying chamber 15, the output end of the sand pump 14 is communicated with the sand blasting chamber 121 through a pipeline, the air compressor 16 is installed on the support frame 11, and the air compressor 16 is communicated with the material conveying chamber 15 through a pipeline.

In addition, the storage tank 13 is used for storing abrasive materials, the bottom end of the storage tank 13 is provided with a conical bottom, the abrasive materials in the storage tank 13 are pumped by the sand pump 14 and are conveyed into the sand blasting chamber 121, and the air compressor 16 and the air compressor push compressed air into the material conveying chamber 15, so that the abrasive materials are sprayed out by the spray nozzle 151, and the outer surface of the metal piece is subjected to sand blasting.

The cleaning mechanism 3 comprises a motor-driven ball screw 31, the ball screw 31 is rotatably installed in the sand blasting chamber 121, a sliding screw 311 is connected to the ball screw 31 in a threaded mode, a lifting frame 312 is fixedly installed on the sliding screw 311, a dust removing roller 32 is rotatably installed on the lifting frame 312, and a brush layer 321 is arranged on the outer surface of the dust removing roller 32.

Further, the ball screw 31 is driven to rotate through the motor, the sliding nut 311 is driven to longitudinally move, the height of the lifting frame 312 is adjusted, the dust removing roller 32 is driven to move, the brush layer 321 on the dust removing roller 32 is an electrostatic brush, and impurities on the outer surface of a metal piece are adsorbed by utilizing static electricity, so that the metal piece is cleaned.

The top wall of the sand blasting chamber 121 is provided with a plurality of blowing heads 33, the blowing heads 33 are provided with air inlet valves 331 through pipelines, the lower end of the fixed casing 12 is provided with a separation box 34, the separation box 34 is communicated with the sand blasting chamber 121, a rotating shaft 35 is rotatably arranged in the separation box 34, a plurality of electromagnets 351 are uniformly distributed on the outer wall of the rotating shaft 35, the outer wall of the separation box 34 is fixedly provided with a driving motor III 352, the driving motor III 352 is in transmission connection with the rotating shaft 35, a collecting box 36 is arranged on the supporting frame 11, and the collecting box 36 is communicated with the separation box 34.

Specifically, the air inlet valve 331 is connected with an air source, and is sprayed out through the plurality of blowing heads 33 to clean the outer surface of the metal piece, wherein waste flows into the separating box 34 from the sand blasting chamber 121, the driving motor III 352 drives the rotating shaft 35 to rotate, when the waste passes through the rotating shaft 35, the electromagnet 351 is electrified to adsorb metal impurities in the waste, and meanwhile, after the electromagnet 351 is powered off, the metal impurities on the rotating shaft 35 are conveniently cleaned, and the rest waste flows into the collecting box 36 to be collected and recycled.

Referring to fig. 5, the present utility model provides a technical solution: a method of blasting a metal piece, comprising the steps of:

s1, clamping a metal piece through a clamping mechanism 2;

s2, performing primary sand blasting processing on the metal piece by the sand blasting mechanism 1;

s3, overturning the metal piece by 180 degrees through the clamping mechanism 2, and then carrying out secondary sand blasting on the metal piece;

s4, cleaning the outer surface of the metal piece by using a cleaning mechanism 3.

The working principle and the using flow of the utility model are as follows: referring to fig. 1 to 5, two ends of a metal member are inserted into a fixing groove 271, a fixing bolt 28 is driven to rotate by rotating a bolt head 281, a fixing block 282 on the fixing bolt 28 is utilized to squeeze the outer wall of the metal member, a supporting pad 29 is matched to lock the metal member, meanwhile, a plastic fixing block 282 can prevent the metal member from being damaged, when the supporting pad 29 is squeezed, a damping spring 292 is squeezed, a swinging motor 26 drives a clamping frame 27 to swing through a transmission connecting rod, meanwhile, the clamping frame 27 is pulled by the connecting spring 251 and reset by self elasticity, the clamping frame 27 vibrates, abrasive materials in a storage tank 13 are pumped by a sand pump 14 and conveyed into a sand blasting chamber 121, an air compressor 16 and an air compressor push compressed air into a material conveying chamber 15, the abrasive materials are sprayed out of a spray nozzle 151, when the abrasive materials collide with the metal member, the abrasive materials are vibrated, repeatedly colliding with the metal piece, driving a motor I22 to drive a bevel gear I211 to rotate after the metal piece is subjected to first sand blasting processing, driving a rotating seat 21 to rotate by utilizing gear transmission, driving the metal piece to overturn, performing second sand blasting processing on the metal piece after 180 degrees, driving a ball screw 31 to rotate by the motor, driving a sliding screw 311 to longitudinally move, adjusting the height of a lifting frame 312, driving a dust removing roller 32 to move, enabling a brush layer 321 on the dust removing roller 32 to adsorb impurities on the outer surface of the metal piece by utilizing static electricity, enabling an air inlet valve 331 to be connected with an air source, spraying through a plurality of spraying heads 33, cleaning the outer surface of the metal piece, enabling waste to flow into a separation box 34 from a sand blasting chamber 121 at the moment, driving a motor III 352 to drive a rotating shaft 35 to rotate, enabling an electromagnet 351 to adsorb metal impurities in the waste after being electrified when the waste passes through the rotating shaft 35, and simultaneously powering off the electromagnet 351, the metal impurities on the rotating shaft 35 are conveniently cleaned, and the rest waste flows into the collecting box 36 for collection and recycling.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. A metalwork sand blasting unit, its characterized in that: the device comprises a sand blasting mechanism (1), a clamping mechanism (2) and a cleaning mechanism (3), wherein the clamping mechanism (2) and the cleaning mechanism (3) are fixedly arranged on the sand blasting mechanism (1);

the sand blasting mechanism (1) comprises a supporting frame (11), a fixed casing (12) is fixedly arranged on the supporting frame (11), and a sand blasting chamber (121) is arranged in the fixed casing (12);

the clamping mechanism (2) comprises rotating seats (21), wherein two rotating seats (21) are rotatably arranged on the inner walls of two sides of the sand blasting chamber (121), one rotating seat (21) is provided with a first bevel gear (211), the inside of the fixed casing (12) is fixedly provided with a first driving motor (22), and the output end of the first driving motor (22) is provided with a second bevel gear (221) meshed with the first bevel gear (211);

the two rotating seats (21) are both connected with fixing rods (23) in a sliding manner, the end parts of the two fixing rods (23) are both fixedly provided with connecting seats (25), the connecting seats (25) are rotationally connected with clamping frames (27) through hinge shafts, a plurality of connecting springs (251) are arranged on the connecting seats (25), one ends of the connecting springs (251) are fixedly connected with the connecting seats (25), and the other ends of the connecting springs are fixedly connected with the outer walls of the clamping frames (27);

one of the connecting seats (25) is fixedly provided with a swinging motor (26), and the output end of the swinging motor (26) is connected with the clamping frame (27) through a transmission connecting rod in a transmission way.

2. A metal piece blasting apparatus as claimed in claim 1, wherein: a rack (231) is arranged on the outer wall of the fixed rod (23);

and a second driving motor (24) is fixedly arranged in the rotating seat (21), and a transmission gear (241) meshed with the rack (231) is arranged at the output end of the second driving motor (24).

3. A metal piece blasting apparatus as claimed in claim 1, wherein: the clamping frame (27) is provided with a fixing groove (271), the clamping frame (27) is connected with a plurality of fixing bolts (28) in a threaded manner, the upper ends of the fixing bolts (28) are provided with bolt heads (281), and the lower ends of the fixing bolts (28) are provided with fixing blocks (282) made of plastic;

the sliding column (291) is slidably mounted on the bottom wall of the fixing groove (271), the supporting pad (29) is fixedly mounted on the sliding column (291), the damping spring (292) is sleeved on the sliding column (291), one end of the damping spring (292) abuts against the bottom wall of the supporting pad (29), and the other end of the damping spring abuts against the inner wall of the fixing groove (271).

4. A metal piece blasting apparatus as claimed in claim 1, wherein: a storage tank (13) is fixedly arranged on the support frame (11), and a sand pump (14) is arranged at the discharge end of the storage tank (13) through a pipeline;

a material conveying chamber (15) is arranged on the top wall of the sand blasting chamber (121), a spray head (151) is arranged at the lower end of the material conveying chamber (15), and the output end of the sand pump (14) is communicated with the sand blasting chamber (121) through a pipeline;

an air compressor (16) is arranged on the supporting frame (11), and the air compressor (16) is communicated with the material conveying chamber (15) through a pipeline.

5. A metal piece blasting apparatus as claimed in claim 1, wherein: the cleaning mechanism (3) comprises a ball screw (31) driven by a motor, the ball screw (31) is rotatably arranged in the sand blasting chamber (121), and a sliding screw nut (311) is connected to the ball screw (31) in a threaded manner;

the dust removing device is characterized in that a lifting frame (312) is fixedly arranged on the sliding nut (311), a dust removing roller (32) is rotatably arranged on the lifting frame (312), and a hairbrush layer (321) is arranged on the outer surface of the dust removing roller (32).

6. A metal piece blasting apparatus as claimed in claim 1, wherein: a plurality of blowing heads (33) are arranged on the top wall of the sand blasting chamber (121), and a plurality of air inlet valves (331) are arranged on the blowing heads (33) through pipelines.

7. A metal piece blasting apparatus as claimed in claim 1, wherein: a separation box (34) is arranged at the lower end of the fixed casing (12), and the separation box (34) is communicated with the sand blasting chamber (121);

a rotating shaft (35) is rotatably arranged in the separation box (34), a plurality of electromagnets (351) are uniformly distributed on the outer wall of the rotating shaft (35), a driving motor III (352) is fixedly arranged on the outer wall of the separation box (34), and the driving motor III (352) is in transmission connection with the rotating shaft (35);

and a collecting box (36) is arranged on the supporting frame (11), and the collecting box (36) is communicated with the separating box (34).

8. A method of blasting a metal part as claimed in any one of claims 1 to 7, comprising the steps of:

s1, clamping a metal piece through the clamping mechanism (2);

s2, performing primary sand blasting processing on the metal piece by the sand blasting mechanism (1);

s3, overturning the metal piece by 180 degrees through the clamping mechanism (2), and then carrying out secondary sand blasting on the metal piece;

s4, cleaning the outer surface of the metal piece by using the cleaning mechanism (3).